Method of making metal barrels and kegs.



LS,AND Kass.

METHOD OF MAKING 'APPLICATION WINFIELD.

METAL BARRE FILED APR. 20. Patented Aug. 31, 1915.

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W. C. WINFIELD. METHOD OF MAKING METAL BARRELS AND KEGS.

APPLICATION FILED APR. 20. I914. 1,151,983, Patented Aug. 31, 1915.

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ITED STATES ATENT oFF cE.

WILLIAM c. WINFIELD, or WARREN, OHIO, AssIGNoR T AMANDA cUMMINs WINFIELD, or WARREN, OHIO.

METHOD OF MAKING METAL BARRELS AND KEGS.

Specification of Letters Patent. Patented Aug, 31, 1915,

Application filed April 20, 19 14. Serial No. 833,007.

' of Making Metal Barrels and Kegs, of

which the following is a specification.

f This invention relates to a method of making metal barrels and kegs, and the method consists of the combination of steps for producing a barrel or keg substantially as herein shown and described and more particularly pointed out in the claims.

In general, the object is to produce. a bilged cylinder for a barrel or keg-of sheet metal by. curling and bilging the side extremities of a flat plate, then rounding and bilging the central portion of the plate, and finally rolling the curled and bilged'product of the foregoing steps into a cylinder of the required diameter.

In the accompanying drawings, Figure 1 is a sectional view of a die and plunger and a, blank holder with a blank or plate in place therein, and Fig. 2 is a sectional .view on line 22, Fig. 1. Figs. 3 and 4 are corresponding views-to Figs. 1 and 2, showing the blank as it appears at the finish of the first pressing operation. Figs. 5 and 6 are sectional views of the dies or formers for carrying on the second pressing operation. Fig. 7 is an end view and Fig. 8 a sectional view on line 8--8, Fig. 7, showing a set of rolls and a finished cylinder therein. Fig. 9 is a cross section of a pair of dies forproducing a flush outside overlapping seam for the cylinder. Figs. 10 and 11 are face and edge views respectively of a blank sheet of metal, and Figs. 12 and 13, are plan andedge views respectively of the blank after the first pressing operation. Figs. 14 and 15 are side and end views respectively of the cylinder after the second pressing opera tion, and Figs. 16 and 17, are side and end views respectively of the completed cylinder.

In practising my method, the first step consists in placing a flat sheet-metal plate :2 of'a predetermined size and thickness between the plunger 3 and the die 4 of a double-acting press having a blank-holder 5 to frictionally engage the plate at each side. j The inside plunger and the female die are curved at each side 6 and 6"approximately ninety degrees of a circle to produce two quarter sections of a cylinder, one at each side end of th blank, and the sides 6 and 6' are also rounded transversely to bilge the blank while pressing and drawing the segmental portions of the cylinder to the desired curvature. The middle portions 7 and 7 of the plunger and die respectively are fluted transversely, the flutes being rounded in cross section and tapered longitudinally at each end,- whereby a series of graduated corrugations 8 in "the middle portion of the blank between the curved and bilged side sections 9 are produced when the plunger is forced to the limit of its downward stroke. The blank at the end of the first step in operations comprises cylinder sections of bilge-shape at its side ends and a fluted or corrugated connecting portion adapted .to be pressed into a bilge shape and-also rounded to complete the cylinder sections.

The next step is to place the partially bilged blank- 2v in a second press comprising a plunger 10 and a die 11 having forming surfaces of approximately the same conformation as the curved and rounded sides 6 and 6 of plunger 3 and die 4:, whereby the central corrugated portion 8 of the blank is pressed to a curved form and at the same time pressed into a corresponding bilge shape as the side sections 9, see Figs. 5 and 6. In this second pressing operation the side sections curl inward or toward each other as pressure is brought to bear on the central fluted or corrugated area of the blank, see Fig. 5. The right-angled flanges 12 which are engaged by the blank-holder 5' and form a part of the'blank at the close of the first operation may be sheared oil before or after the second pressing operation.

The curled and bilged product of the second operation is now rolled to a smaller diameter to bring the side edges into abutting or overlapping relations and to form a completed cylinder. Rolling is accomplished by 'a pair of concaved rolls 14 and a single conand where a flush overlapping seam is also desired one or both meeting edges of the cylinder blank may be offset or shouldered by dies 18, see Fig. 9. The longitudinal seam in the cylinder may be united and closed by rivets or by any of the known methods of Welding. r

\Vhat I claim is:

1. The method of making a bilged cylinder, consisting in pressing selected areas of a metal blank into cylindrical segments of bilge-shape and intervening areas into corrugations transversely of said blank; and subsequently bilging and curving the corrugated area of the blank to complete the bilged cylindrical body for a cylinder.

2. The method of making a bilgedfcylinder, consisting in successively pressing SQ-I lected areas of a metal blank into cylindrical segments of bilge, shape and forming straight end edges at the ends of said segments; and subsequently forming the said segments into a complete cylinder.

In testimony whereof I. afliX my signature 30 in presence of two witnesses. v WILLIAM G. WINFIELD v Witnesses: v

R. B. Mosnn, Joan E. HOYNES. 

